Excavatin g - elevato r



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W. L. SMYTH. EXGAVATING ELEVATOR.

No. 421,113.. Patented Feb. 11,1890.

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W. L. SMYTH.

EXGAVATING ELEVATOR.

Nd. 421,113. Patented'Peb. 11,1890.

.county of Albany Urrr: frATES WILLIAM L. SMYTH, OF VAN 'WIES, ASSIGNORTO MARY F. SMITH, OF BETHLEHEM, NEWVYORK.

SPECIFICATION forming part of Letters Patent N 0. 421,113, datedFebruary 11, 1890.

Application filed October 5 1888. Serial No. 287.281. (Ho model.) I

To all whom it may concern: Be it known that I, WILLIAM L. SMYTH, aresident of Hazlewood, Van WVies, in, the 1 and State of New York, naveinvented certain new and useful Improvements in Excavating Elevators;and I do hereby declare .that the following is a full, clear, and exactvention that will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanymg drawings, and t the letters of reference marked thereon,which form a part of this specification.

Similar letters refer to similar parts in the several figures therein.My invention relates to improvements in excavatingelevators; and itconsists of the novel construction and combination of parts hereinafterdescribed, and pointed out in the claims.

Figure 1 of the drawings is a view in side elevation of my improvedelevator. Fig. 2 is a view in front elevation of the same parts with aportion of the bucket-chain broken away, and showing the device mountedupon a turn-table. Fig. 3 is a sectional view taken on the broken line00 0c in Figs. 1 and 2. Fig. 4 is a sectional view of the arm A taken onthe broken line y y in Fig. 1. Fig. 5 is a sectional View of themainmast and slide-block, taken 011 the broken line z 2', Fig. l. Thelast three figures are made upon an enlarged scale. In Fig. 2 the scaleis somewhat exaggerated for convenience in'illust-ration, the lateraldimensions being nearly doubled.

Though my improved elevator is adapted to lift grain, coal, and otherarticles from a lower to a higher plane, it is especially applieable fordredging or excavating soil, and also elevating it to adistributing-point on a higher plane.

The device may be erected from a dock or boat when the excavation is tobe made beneath a body of water.

The supporting-mast A is erected from the turn-table A and provided withbraces A and A The turn-table may be mounted upon a series of balls A,adapted to roll in the annular grooves A and A in the table descriptionof the in-' and supporting-base A respectively. The mast is providedwith and supports a laterally-projecting arm A stayed by brace A The armsupports at its lower end an elevatorleg B, and at its upper end theshaft which drives and partly supports the endless bucket-chain O. Theleg is connected with the arm by the fork A, the lower bifurcate ends Aof the fork being pivoted to the arm,one end on one side and the otheron the other side of the arm. The fork is also provided with uppersmaller-bifurcate ends A which support a shaft B, upon which shaft arefixed the sprocket-wheelB at the middle part and the pinions B one ateach end. This shaft also serves to pivot the upper ends of the fork tothe bifurcate arms B of another fork having a stem B This stem isprovided with a toothed rack B adapted to engage with and be supportedby the pinion B fixed upon shaft B This shaft is also provided withafixed pulley B and has its hearings in the upper end of the mast.

The pulley B is connected by a belt or cord B with the crank-wheel Bfixed upon a shaft which has its bearings in the lower end of brace AThe rack is held in engagement with the pinion by the, roller 13. Thefork arms B serve to support a shaft 13 upon which is fixed the smallsprocket-wheel 13, connected by chain 13 with the wheel B Fixed upon thesame shaft B is alarger pulley or sprocket wheel B provided with anoperating endless belt or chain B".

The pinions B are adapted to travel along B forming the leg B. The othertwo bars B serve to hold the pinions in engagement with theirplate-gears.

The leg is made up of the four bars or strips B and 13 and is providedat its lower end with a loose pulley B adapted to support and guide thebucket chain. This chain passes up over guide-pulley C, supported uponthe lower ends of arm A up along the arm over the driving-pulley 0mounted upon the driving-shaft 0 where the buckets are inverted, passingdown over guide-pulley 0 down around the vertically-adjustableguidepulley C movably secured to the mainmast,

a plate-gear B secured to two of the bars up along the mastto theguide-pulley C", over the same, down the arm A, over guide C to theplace of beginning at the guide-pulley in the leg.

The driving-shaft- (3 may be driven in any well-known manner. I haveshown a pulley fixed thereon with a driving belt broken away.

The sides of the frame or block which supports the pulley C is providedon its sides with the guides C adapted to slide in correspondingvertical grooves A in the mainmast. A friction block or pulley C" isseen red to the table and a rope or chain 0 passed under the same, oneend of the rope being secured to the slide-block and the other endleading to a capstan C or equivalent device for communicating a downwardslide movement to the slide-block which supports pulley C.

The operation of the machine is as follows: Power is applied to rotatethe driving-shaft C thereby imparting motion to the chain and buckets,which may be constructed and arranged in any well known manner, thechain 0 slackened to permit of an upward movement of the slide-block,and rotary movement communicated to the pinions B by means of rope B"and connecting-chain and sprocket-wheels in a direction to force the leg13 downward, by reason of the action of the pinions upon the racks withwhich they engage. The leg is thus forced downward until the bucketssecured to the chain come in contact with the soil to be excavated orother substance to be elevated. The excavated material is carried by thebuckets up over the pulley C where it falls as the buckets are invertedinto a chute 0 as indicated in Fig. 1. The chute may be of anywell-known form and lead to such place as may be desired to deposit thematerial as excavated. Itis manitest that the position of the leg maybevaried vertically, as desired, by means of the pinions B andoperatingmechanism. The lower end of the leg can also be easily movedtoward or from the mast by means of the rack 13 and pinion B operated bythe crank-wheel B The shaft 13 of the pulley G projects sufficiently ateach end to form a pivot-guide or fulcrum for the leg, the channel I3forming a slideway for the pivot when vertical movements arecommunicated to the leg. It the rack is forced outward from the mast bythe pinion B, the lower end of the leg will be forced inward,oscillating upon the pivot formed by the shaft B Lateral movement ineither direction may be communicated to the leg by imparting a rotarymovement to the supporting-table. Such rotary movement may becommunicated by hand or in any wellknown manner. \Vhen the leg is givenan upward movement by means of the pinions B, the slack in thebucket-chain is taken up by drawing the slide-block 0 down toward thetable by means of the chain O as before explained. As shown in thedrawings, the slide-block is at its lowest limit of slide movement. Itsupward limit is the level of the guide-pulley C. It is apparent that theleg can be given a vertical movement equal to the slide movement of theslide-block. The pinions 13' are held in engagement with theirplate-gear on the leg by the flanges a, which fill the channel andprevent the pinions from slipping their cogs or sliding longitudinallyott their racks.

lVh-at I claim as new, and desire to secure 'by Letters Patent, is-

1. In an exeavatingclevatorhavin g an endless bucket-ehain andchain-guiding pulleys, the combination, with a rotary mast provided witha laterally-proj ecting leg-supporting arm and a vertical slideway for aslide'block, of an elevator-leg secured to such arm and adjustablevertically, and a chain-guiding pulley having a block verticallyadjust-able along the slideway in the mast, provided with means forcommunicating slide movements to such slide-block, substantially asdescribed.

2. In an excavatirig-elevator having an endless bucketchain, thecombination, with a mast provided with a laterallyproj ecting arm, of apinion rotary in bearings supported by such arm and means for impartinga rotary movement to such pinion, an elevator-leg pro: vided with alongitudinal pivot receiving channel, a pinion-engaging rack fixed uponthe leg, a chain-guiding pulley located at the lower end of the leg, apivot-guide fixed upon the 1nast-arm and having a slideway in thechannel in the leg, and means for oscillating the leg upon suchpivot-guide, substantially as described.

In testimony whereof I have hereunto set my hand this 20th day ofSeptember, 1888.

\VILLIAM L. SMYTII.

\Vitnesses:

GEO. A. lllosnnn, Urms. L. ALDEN.

